rappusiin

Rappusiin is a Finnish word that functions as the illative form of the noun rappu, meaning a staircase or stairwell. It is used to express movement toward or into a staircase, and it appears in everyday language, signage, and architectural descriptions when directions to a stairwell are given.

In Finnish grammar, the illative case marks direction toward a place. Rappusiin specifically signals entering or heading toward a staircase within a building. The form is one example of how location words can be inflected to indicate movement through space.

Rappusiin is related to other terms in the same lexical family, such as rappu (stair), rappuset (the stairs themselves), and rappukäytävä (stairwell corridor). While rappusiin denotes direction toward a staircase, other cases and compounds describe related concepts, such as locating on a particular floor or inside a stairwell.

The word is most commonly encountered in practical contexts, including building plans, signage, and instructional or descriptive writing about interior architecture. As a standard part of Finnish morphology, rappusiin illustrates how directional meaning is conveyed through case endings in everyday language.

See also: Finnish language, illative case, rappu, rappuset, rappukäytävä.